> When a sub-command dies due to a signal, we encode the
> signal number into the numeric exit status as "signal -
> 128".
[...]
> So we have a negative value inside the code, but once it
> passes across an exit() barrier, it looks positive (and any
> code we receive from a sub-shell will have the positive
> form).
[...]
> Unfortunately, this means that when the "use_shell" option
> is set, we need to be on the lookout for _both_ forms.
[...]
> for the callers that do care, we can make life
> slightly easier by just using the consistent positive form.
Makes perfect sense.
> Documentation/technical/api-run-command.txt | 6 ++----
> editor.c | 2 +-
> run-command.c | 2 +-
> 3 files changed, 4 insertions(+), 6 deletions(-)
t/test-terminal.perl imitates the same logic. It doesn't check for
anything other than whether the exit status is 0, but maybe it would
be worth squashing in the below as a futureproofing measure
nonetheless.
Aside from the launch_editor bugfix, the only observable effects of
the above patch I can find are some changed error messages:
error: external filter cat failed -126
-> error: external filter cat failed 130
warning: svnrdump, returned -126
-> warning: svnrdump, returned 130
Those messages are equally senseless before and after the patch, so
for what it's worth,
Reviewed-by: Jonathan Nieder <jrnie...@gmail.com>
Thanks.
diff --git i/t/test-terminal.perl w/t/test-terminal.perl
index 10172aee..1fb373f2 100755
--- i/t/test-terminal.perl
+++ w/t/test-terminal.perl
@@ -31,7 +31,7 @@ sub finish_child {
} elsif ($? & 127) {
my $code = $? & 127;
warn "died of signal $code";
- return $code - 128;
+ return $code + 128;
} else {
return $? >> 8;
}
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